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When joining steel pipe what should be applied to the pipe threads before connecting?
Wiki User
∙ 12y ago
when joining to lengths of black steel it is necessary to use either Teflon tape or pipe dope, also called leak lock, this is not to seal the joint per say but the tape and doping act as a lubricant on the threads of the joint allowing for the pipe to be turned together tighter also the dope will dry and become a sealant
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoEither paste pipe dope or Teflon tape. Either will work. Threads on the male side should be filled with dope or 4-5 layers of tape.
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